Question

State bohr postulate of hydrogen atom that gives the relationship for the frequency of emitted photon in a transition.

Answer 1

When an electron makes a transition from one of its non-radiating orbits to another of lower energy, a photon is emitted having energy equal to the energy difference between the two states. The frequency of the emitted photon is then given by, $v=\frac{E_i-E_f}{h}$